KB25588 - [MX] How does the port numbering work on an MX Series 5/10/40/80 device [juniper.net]  mentions that a particular MIC slot is activated depending on the MX license installed on the MX5/10/40/80 Series routers.

The MICs and ports activated by the license type are as follows:

• MX5  - MIC 1/0 only
• MX10 - MIC 1/0 and MIC 1/1
• MX40 - MIC 1/0, MIC 1/1, and ports xe-0/0/0 and xe-0/0/1 of MIC 0/0
• MX80 - MIC 1/0, MIC 1/1, and MIC 0/0 including ports xe-0/0/2 and xe-0/0/3

The point to note here is that MX5 does not support MIC 0/0 in a built-in FPC0 with 4 x 10GE XFP ports. However, users may see MIC 0/0 port status on an MX5 that was delivered to them as an RMA replacement part.

This article demonstrates such a scenario and clarifies that no action would be required and that the device can be used as expected.

MX5-T ( SN:XXXX ) does not show interface status of xe-0/0/*, and all xe-0/0/* port LEDs are OFF. This is expected because MX5 does not support "xe-" interfaces in MIC 0/0.

########## MX5-T S/N:XXXXX ##########

User@MX5_XXXXX> show version

Hostname: MX5_XXXXX
Model: mx5-t
Junos: 17.3R3-S2.2

User@MX5_XXXXX> show chassis hardware

Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                XXXXX             MX5-T
Midplane         REV 07   711-061451   CANB1462          MX5-T
PEM 0            Rev 06   740-028288   1GA78510024       AC Power Entry Module
PEM 1            Rev 06   740-028288   1GA79250363       AC Power Entry Module
Routing Engine            BUILTIN      BUILTIN           Routing Engine
  da0    3835 MB  ATP IG eUSB                            Nand Flash 0
  da1    3835 MB  ATP IG eUSB                            Nand Flash 1
TFEB 0                    BUILTIN      BUILTIN           Forwarding Engine Processor
  QXM 0          REV 08   711-028408   CANC7708          MPC QXM
FPC 0                     BUILTIN      BUILTIN           MPC BUILTIN
  MIC 0                   BUILTIN      BUILTIN           4x 10GE XFP
    PIC 0                 BUILTIN      BUILTIN           4x 10GE XFP
FPC 1                     BUILTIN      BUILTIN           MPC BUILTIN
  MIC 0          REV 37   750-028392   CAMY3451          3D 20x 1GE(LAN) SFP
    PIC 0                 BUILTIN      BUILTIN           10x 1GE(LAN) SFP
    PIC 1                 BUILTIN      BUILTIN           10x 1GE(LAN) SFP
Fan Tray                                                 Fan Tray

User@MX5_XXXXX> show configuration interfaces
interfaces {
    xe-0/0/0 {
        disable;
    }
    xe-0/0/1 {
        disable;
    }
    xe-0/0/2 {
        disable;
    }
    xe-0/0/3 {
        disable;
    }
}

User@MX5_XXXXX> show system license
License usage:
                                  Licenses     Licenses    Licenses    Expiry
   Feature name                       used    installed      needed
   scale-subscriber                      0           10           0    permanent
   scale-l2tp                            0         1000           0    permanent
   scale-mobile-ip                       0         1000           0    permanent
   mx5-to-mx10-upgrade                   1            0           1    28 days
   mx10-to-mx40-upgrade                  1            0           1    28 days
   mx40-to-mx80-upgrade                  1            0           1    28 days

 Licenses installed: none

User@MX5_XXXXX> show interfaces xe-0/0/* terse

MX5-T ( SN:YYYYY ) shows interface status of xe-0/0/*, and all xe-0/0/* port LEDs are ON in Red. This is unexpected due to the same reason mentioned above.

########## MX5-T S/N:YYYYY ##########

User@MX5_YYYYY> show version

Hostname: MX5_YYYYY
Model: mx5-t
Junos: 17.3R3-S2.2

User@MX5_YYYYY> show chassis hardware

Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                YYYYY             MX5-T
Midplane         REV 11   711-038215   ABCV3970          MX5-T
PEM 0            Rev 06   740-028288   1GA78510024       AC Power Entry Module
PEM 1            Rev 06   740-028288   1GA79250363       AC Power Entry Module
Routing Engine            BUILTIN      BUILTIN           Routing Engine
  da0    3820 MB  QYR4000F4                              Nand Flash 0
  da1    3820 MB  QYR4000F4                              Nand Flash 1
TFEB 0                    BUILTIN      BUILTIN           Forwarding Engine Processor
  QXM 0          REV 07   711-028408   ABCK6395          MPC QXM
FPC 0                     BUILTIN      BUILTIN           MPC BUILTIN
  MIC 0                   BUILTIN      BUILTIN           4x 10GE XFP
    PIC 0                 BUILTIN      BUILTIN           4x 10GE XFP
FPC 1                     BUILTIN      BUILTIN           MPC BUILTIN
  MIC 0          REV 37   750-028392   CAMY3451          3D 20x 1GE(LAN) SFP
    PIC 0                 BUILTIN      BUILTIN           10x 1GE(LAN) SFP
    PIC 1                 BUILTIN      BUILTIN           10x 1GE(LAN) SFP
Fan Tray                                                 Fan Tray

User@MX5_YYYYY> show configuration interfaces
interfaces {
    xe-0/0/0 {
        disable;
    }
    xe-0/0/1 {
        disable;
    }
    xe-0/0/2 {
        disable;
    }
    xe-0/0/3 {
        disable;
    }
}

User@MX5_YYYYY> show system license | no-more
 License usage:
                                   Licenses     Licenses    Licenses    Expiry 
   Feature name                       used    installed      needed
   scale-subscriber                      0           10           0    permanent
   scale-l2tp                            0         1000           0    permanent
   scale-mobile-ip                       0         1000           0    permanent
   mx5-to-mx10-upgrade                   1            0           1    29 days
   mx10-to-mx40-upgrade                  1            0           1    29 days
   mx40-to-mx80-upgrade                  1            0           1    29 days
      
 Licenses installed: none

User@MX5_YYYYY> show interfaces xe-0/0/* terse
xe-0/0/0                down  down
xe-0/0/1                down  down
xe-0/0/2                down  down
xe-0/0/3                down  down

These two MX5-Ts are behaving differently although they have the same HW/SW version, configuration, and licenses. 

The following CLI commands show that both are MX5, but the difference is seen only in jnxLicenseMIB.
MX5-T ( SN:YYYYY )  is showing some upgrade licenses via jnxLicenseMIB as shown below:

########## MX5-T S/N:XXXXX ##########

User@MX5_XXXXX> show chassis personality 
mx5-t

User@MX5_XXXXX> show system license usage 
                                 Licenses     Licenses    Licenses    Expiry
  Feature name                       used    installed      needed 
  scale-subscriber                      0           10           0    permanent
  scale-l2tp                            0         1000           0    permanent
  scale-mobile-ip                       0         1000           0    permanent
 
User@MX5_XXXXX> show system license installed 

Licenses installed: none

User@MX5_XXXXX> show system license keys 

User@MX5_XXXXX> show snmp mib walk jnxBoxPersonality 
jnxBoxPersonality.0 = jnxProductNameMX5

User@MX5_XXXXX> show snmp mib walk jnxLicenseMIB 
jnxLicenseFeatureName.44 = scale-subscriber
jnxLicenseFeatureName.45 = scale-l2tp
jnxLicenseFeatureName.46 = scale-mobile-ip
jnxLicenseFeatureDescr.44 = Dynamic/Static Subscriber Base Feature
jnxLicenseFeatureDescr.45 = L2TP Base Feature
jnxLicenseFeatureDescr.46 = Mobile Ip Base Feature
jnxLicenseFeatureLicenseId.44
jnxLicenseFeatureLicenseId.45
jnxLicenseFeatureLicenseId.46
jnxLicenseFeatureLicenseUsed.44 = 0
jnxLicenseFeatureLicenseUsed.45 = 0
jnxLicenseFeatureLicenseUsed.46 = 0
jnxLicenseFeatureLicenseInstalled.44 = 10
jnxLicenseFeatureLicenseInstalled.45 = 1000
jnxLicenseFeatureLicenseInstalled.46 = 1000
jnxLicenseFeatureLicenseNeeded.44 = 0
jnxLicenseFeatureLicenseNeeded.45 = 0
jnxLicenseFeatureLicenseNeeded.46 = 0

########## MX5-T S/N:YYYYY ##########

User@MX5_YYYYY> show chassis personality 
mx5-t

User@MX5_YYYYY> show system license usage 
                                 Licenses     Licenses    Licenses    Expiry
  Feature name                       used    installed      needed 
  scale-subscriber                      0           10           0    permanent
  scale-l2tp                            0         1000           0    permanent
  scale-mobile-ip                       0         1000           0    permanent

User@MX5_YYYYY> show system license installed 

Licenses installed: none
 
User@MX5_YYYYY> show system license keys 

User@MX5_YYYYY> show snmp mib walk jnxBoxPersonality 
jnxBoxPersonality.0 = jnxProductNameMX5

User@MX5_YYYYY> show snmp mib walk jnxLicenseMIB 
jnxLicenseFeatureName.44 = scale-subscriber
jnxLicenseFeatureName.45 = scale-l2tp
jnxLicenseFeatureName.46 = scale-mobile-ip
jnxLicenseFeatureName.102 = mx5-to-mx10-upgrade
jnxLicenseFeatureName.103 = mx10-to-mx40-upgrade
jnxLicenseFeatureName.104 = mx40-to-mx80-upgrade
jnxLicenseFeatureDescr.44 = Dynamic/Static Subscriber Base Feature
jnxLicenseFeatureDescr.45 = L2TP Base Feature
jnxLicenseFeatureDescr.46 = Mobile Ip Base Feature
jnxLicenseFeatureDescr.102 = MX5 to MX10 Upgrade
jnxLicenseFeatureDescr.103 = MX10 to MX40 Upgrade
jnxLicenseFeatureDescr.104 = MX40 to MX80 Upgrade
jnxLicenseFeatureLicenseId.44
jnxLicenseFeatureLicenseId.45
jnxLicenseFeatureLicenseId.46
jnxLicenseFeatureLicenseId.102
jnxLicenseFeatureLicenseId.103
jnxLicenseFeatureLicenseId.104
jnxLicenseFeatureLicenseUsed.44 = 0
jnxLicenseFeatureLicenseUsed.45 = 0
jnxLicenseFeatureLicenseUsed.46 = 0
jnxLicenseFeatureLicenseUsed.102 = 1
jnxLicenseFeatureLicenseUsed.103 = 1
jnxLicenseFeatureLicenseUsed.104 = 1
jnxLicenseFeatureLicenseInstalled.44 = 10
jnxLicenseFeatureLicenseInstalled.45 = 1000
jnxLicenseFeatureLicenseInstalled.46 = 1000
jnxLicenseFeatureLicenseInstalled.102 = 0
jnxLicenseFeatureLicenseInstalled.103 = 0
jnxLicenseFeatureLicenseInstalled.104 = 0
jnxLicenseFeatureLicenseNeeded.44 = 0
jnxLicenseFeatureLicenseNeeded.45 = 0
jnxLicenseFeatureLicenseNeeded.46 = 0
jnxLicenseFeatureLicenseNeeded.102 = 1
jnxLicenseFeatureLicenseNeeded.103 = 1
jnxLicenseFeatureLicenseNeeded.104 = 1

After the grace period expires on MX5-T (SN:YYYYY) , interfaces xe-0/0/* status is not seen, and jnxLicenseMIB does not show the obsolete upgrade licenses.
Users can wait until the grace period is expired and the inconsistency is resolved.  The output below shows after the grace period is over for  MX5-T (SN:YYYYY).

########## MX5-T S/N:YYYYY ##########

User@MX5_YYYYY> show chassis personality
mx5-t

User@MX5_YYYYY> show system license usage
                                 Licenses     Licenses    Licenses    Expiry
  Feature name                       used    installed      needed
  scale-subscriber                      0           10           0    permanent
  scale-l2tp                            0         1000           0    permanent
  scale-mobile-ip                       0         1000           0    permanent

User@MX5_YYYYY> show system license installed

Licenses installed: none

User@MX5_YYYYY> show interfaces xe-0/0/* terse


User@MX5_YYYYY>  show snmp mib walk jnxLicenseMIB
jnxLicenseFeatureName.44 = scale-subscriber
jnxLicenseFeatureName.45 = scale-l2tp
jnxLicenseFeatureName.46 = scale-mobile-ip
jnxLicenseFeatureDescr.44 = Dynamic/Static Subscriber Base Feature
jnxLicenseFeatureDescr.45 = L2TP Base Feature
jnxLicenseFeatureDescr.46 = Mobile Ip Base Feature
jnxLicenseFeatureLicenseId.44
jnxLicenseFeatureLicenseId.45
jnxLicenseFeatureLicenseId.46
jnxLicenseFeatureLicenseUsed.44 = 0
jnxLicenseFeatureLicenseUsed.45 = 0
jnxLicenseFeatureLicenseUsed.46 = 0
jnxLicenseFeatureLicenseInstalled.44 = 10
jnxLicenseFeatureLicenseInstalled.45 = 1000
jnxLicenseFeatureLicenseInstalled.46 = 1000
jnxLicenseFeatureLicenseNeeded.44 = 0
jnxLicenseFeatureLicenseNeeded.45 = 0
jnxLicenseFeatureLicenseNeeded.46 = 0

2021-04-16: Minor, non-technical edits.